No-twist compound pendulum consisting of oscillating bar and cylindrical pendant in ring connection

Abstract

The invention discloses a no-twist compound pendulum consisting of an oscillating bar and a cylindrical pendant in ring connection, and relates to the field of manufacturing of a compound pendulum, particularly to the manufacturing of a no-twist compound pendulum applied to a gravitational acceleration experiment of a compound pendulum. The existing compound pendulum oscillating bar is in linear contact with the pendant, and thus twist happens frequently; and some patents adopt knife edge contact, and the durability of the pendant and the oscillating bar is low. In order to overcome the shortcomings of frequent twist of a common compound pendulum and easy damage in knife edge contact, the invention adopts a compound pendulum oscillating rod consisting of connected metal rings. According to the technical scheme, a plurality of rings with outer diameter of 1.2cm, which are composed of multiple stainless steel wires or high-hardness aluminum alloy wires with cross-sectional diameter of 2mm are symmetrically cut by 1mm thickness in a diameter direction, and the tangent plane contact of each ring is subjected to spot welding to form a compound pendulum oscillating bar. The no-twist compound pendulum has the following beneficial effects that point contact is realized between the compound pendulum oscillating bar and the pendant, and the twist of the compound pendulum oscillating bar can be effectively avoided; and the point contact is not knife edge contact, which ensures the peaceful coexistence of the oscillating bar and the pendant and improves the durability of the compound pendulum oscillating bar and the pendant.

Description

technical field [0001] The invention relates to the field of compound pendulum manufacture, in particular to the manufacture of a twist-free compound pendulum used in the experiment of measuring the acceleration of gravity with the compound pendulum. Background technique [0002] The currently used compound pendulum swing rod is in line contact with the pendant. Due to the unevenness of the pendant, the compound pendulum pendulum is prone to twisting, and it takes a long time to adjust the level of the pendant. There are patents that use knife-edge contact, and the knife-edge is point contact. , can effectively avoid twisting, but the sharper the knife edge is, the closer it is to point contact. [0003] The pendulum hole spacing of most laboratory pendulums is 2cm. Contents of the invention [0004] In order to overcome the deficiencies of ordinary compound pendulum being easy to twist and knife-edge contact being easily damaged, the present invention adopts a compound p...

AI Technical Summary

Problems solved by technology

[0002] The currently used compound pendulum swing rod is in line contact with the pendant. Due to the unevenness of the pendant, the compound pendulum pendulum is prone to twisting, and it takes a long time to adjust the level of the pendant. There are patents that use knife-edge contact, and the knife-edge is point contact. , can effectively avoid twisting, but the sharper the knife edge is, the closer it is to point contact. The sharper the knife edge will damage the hanging rod, and the knife edge itself will gradually wear out, making the durability of the hanging rod and swing rod poor.

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